\documentclass{article}
\usepackage{array}
\newcolumntype{R}{>{\displaystyle}r}
% automatically in display math style
\newcolumntype{O}{>{{}}c<{{}}}
% "O" for "operator" ...
\begin{document}
\[
\setlength\arraycolsep{0pt}
% no need for extra intercolumn whitespace
\begin{array}{*{11}{RO}R@{}@{}}
	&-& \frac{1}{10}
	&+& \cdots \\[2.5ex]
\end{array}
\]
\end{document} `
